Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* |
| 2 | * Copyright (c) 1997-1999 Massachusetts Institute of Technology |
||
| 3 | * |
||
| 4 | * This program is free software; you can redistribute it and/or modify |
||
| 5 | * it under the terms of the GNU General Public License as published by |
||
| 6 | * the Free Software Foundation; either version 2 of the License, or |
||
| 7 | * (at your option) any later version. |
||
| 8 | * |
||
| 9 | * This program is distributed in the hope that it will be useful, |
||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 12 | * GNU General Public License for more details. |
||
| 13 | * |
||
| 14 | * You should have received a copy of the GNU General Public License |
||
| 15 | * along with this program; if not, write to the Free Software |
||
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 17 | * |
||
| 18 | */ |
||
| 19 | |||
| 20 | /* This file was automatically generated --- DO NOT EDIT */ |
||
| 21 | /* Generated on Tue May 18 13:55:57 EDT 1999 */ |
||
| 22 | |||
| 23 | #include <ports/fftw-int.h> |
||
| 24 | #include <ports/fftw.h> |
||
| 25 | |||
| 26 | /* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-backward 2 */ |
||
| 27 | |||
| 28 | /* |
||
| 29 | * This function contains 8 FP additions, 6 FP multiplications, |
||
| 30 | * (or, 6 additions, 4 multiplications, 2 fused multiply/add), |
||
| 31 | * 11 stack variables, and 16 memory accesses |
||
| 32 | */ |
||
| 33 | static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000); |
||
| 34 | |||
| 35 | /* |
||
| 36 | * Generator Id's : |
||
| 37 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
||
| 38 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
||
| 39 | * $Id: fhb_2.c,v 1.1.1.1 2002-03-29 14:12:57 pj Exp $ |
||
| 40 | */ |
||
| 41 | |||
| 42 | void fftw_hc2hc_backward_2(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist) |
||
| 43 | { |
||
| 44 | int i; |
||
| 45 | fftw_real *X; |
||
| 46 | fftw_real *Y; |
||
| 47 | X = A; |
||
| 48 | Y = A + (2 * iostride); |
||
| 49 | { |
||
| 50 | fftw_real tmp11; |
||
| 51 | fftw_real tmp12; |
||
| 52 | ASSERT_ALIGNED_DOUBLE(); |
||
| 53 | tmp11 = X[0]; |
||
| 54 | tmp12 = X[iostride]; |
||
| 55 | X[iostride] = tmp11 - tmp12; |
||
| 56 | X[0] = tmp11 + tmp12; |
||
| 57 | } |
||
| 58 | X = X + dist; |
||
| 59 | Y = Y - dist; |
||
| 60 | for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 1) { |
||
| 61 | fftw_real tmp3; |
||
| 62 | fftw_real tmp4; |
||
| 63 | fftw_real tmp8; |
||
| 64 | fftw_real tmp5; |
||
| 65 | fftw_real tmp6; |
||
| 66 | fftw_real tmp10; |
||
| 67 | fftw_real tmp7; |
||
| 68 | fftw_real tmp9; |
||
| 69 | ASSERT_ALIGNED_DOUBLE(); |
||
| 70 | tmp3 = X[0]; |
||
| 71 | tmp4 = Y[-iostride]; |
||
| 72 | tmp8 = tmp3 - tmp4; |
||
| 73 | tmp5 = Y[0]; |
||
| 74 | tmp6 = X[iostride]; |
||
| 75 | tmp10 = tmp5 + tmp6; |
||
| 76 | X[0] = tmp3 + tmp4; |
||
| 77 | Y[-iostride] = tmp5 - tmp6; |
||
| 78 | tmp7 = c_re(W[0]); |
||
| 79 | tmp9 = c_im(W[0]); |
||
| 80 | X[iostride] = (tmp7 * tmp8) + (tmp9 * tmp10); |
||
| 81 | Y[0] = (tmp7 * tmp10) - (tmp9 * tmp8); |
||
| 82 | } |
||
| 83 | if (i == m) { |
||
| 84 | fftw_real tmp1; |
||
| 85 | fftw_real tmp2; |
||
| 86 | ASSERT_ALIGNED_DOUBLE(); |
||
| 87 | tmp1 = X[0]; |
||
| 88 | X[0] = K2_000000000 * tmp1; |
||
| 89 | tmp2 = Y[0]; |
||
| 90 | X[iostride] = -(K2_000000000 * tmp2); |
||
| 91 | } |
||
| 92 | } |
||
| 93 | |||
| 94 | static const int twiddle_order[] = |
||
| 95 | {1}; |
||
| 96 | fftw_codelet_desc fftw_hc2hc_backward_2_desc = |
||
| 97 | { |
||
| 98 | "fftw_hc2hc_backward_2", |
||
| 99 | (void (*)()) fftw_hc2hc_backward_2, |
||
| 100 | 2, |
||
| 101 | FFTW_BACKWARD, |
||
| 102 | FFTW_HC2HC, |
||
| 103 | 58, |
||
| 104 | 1, |
||
| 105 | twiddle_order, |
||
| 106 | }; |